Tools

by
Radu Stoleru, Tian He, John A. Stankovic
- In Secure Localization and Time Synchronization for Wireless Sensor and Ad Hoc Networks, 2007

"... Advances in micro-electro-mechanical systems have triggered an enormous interest in wireless sensor networks (WSN). WSN are formed by large numbers of densely deployed nodes enabled with sensing and actuating capabilities. These nodes have very limited processing and memory capabilities, limited ..."

Advances in micro-electro-mechanical systems have triggered an enormous interest in wireless sensor networks (WSN). WSN are formed by large numbers of densely deployed nodes enabled with sensing and actuating capabilities. These nodes have very limited processing and memory capabilities, limited

"... Wireless Sensor Networks have been proposed for a multitude of location-dependent applications. For such systems, the cost and limitations of hardware on sensing nodes prevent the use of range-based localization schemes that depend on absolute point-to-point distance estimates. Because coarse accura ..."

accuracy is sufficient for most sensor network applications, solutions in range-freelocalization are being pursued as a cost-effective alternative to more expensive range-based approaches. In this paper, we present APIT, a novel localization algorithm that is range-free. We show that our APIT scheme

"... Wireless sensor networks have been proposed for many location-dependent applications. In such applications, the requirement of low system cost prohibitsmany range-based methods for sensor node localization; on the other hand, range-free localization depending only on connectivity may underutilize th ..."

Wireless sensor networks have been proposed for many location-dependent applications. In such applications, the requirement of low system cost prohibitsmany range-based methods for sensor node localization; on the other hand, range-freelocalization depending only on connectivity may underutilize

"... Sensor localization has become an essential requirement for many applications over wireless sensor networks. Radio irregularity and stringent constraints on hardware cost and battery power, however, make localization very challenging. Range-based localization depends on special-purpose hardware for ..."

for direct measurement of the distance to reference points. Range-freelocalization, in contrast, does not depend on absolute point-to-point distance measurement and thus does not require extra hardware. We present a range-freelocalization method using Ring-Overlapping based on Comparison of Received Signal

"... Abstract: In wireless sensor networks (WSNs), the location information of sensor nodes are important for implementing other network applications. In this paper, we propose a range-free Localization algorithm based on Neural Network Ensembles (LNNE). The location of a sensor node is estimated by LNNE ..."

Abstract: In wireless sensor networks (WSNs), the location information of sensor nodes are important for implementing other network applications. In this paper, we propose a range-freeLocalization algorithm based on Neural Network Ensembles (LNNE). The location of a sensor node is estimated

"... With the proliferation of location dependent applications in sensor networks, location awareness becomes an essential capability of sensor nodes. Because coarse accuracy is sufficient for most sensor network applications, solutions in range-free localization are being pursued as a cost-effective alt ..."

With the proliferation of location dependent applications in sensor networks, location awareness becomes an essential capability of sensor nodes. Because coarse accuracy is sufficient for most sensor network applications, solutions in range-freelocalization are being pursued as a cost

"... In this paper, a novel range-free localization algorithm for anisotropic networks is proposed. In the proposed method, the characteristics of the given network are considered and each sensor node estimates the relation between the hop counts and the geographical distances. Unlike most of the previou ..."

In this paper, a novel range-freelocalization algorithm for anisotropic networks is proposed. In the proposed method, the characteristics of the given network are considered and each sensor node estimates the relation between the hop counts and the geographical distances. Unlike most

"... Wireless sensor networks have become a hot research area due to their numerous applications in monitoring inaccessible areas, which are difficult to be monitored by conventional methods. A large number of wireless sensor network based applications are location dependent, where the sensed data is mea ..."

is meaningless without accurate location of its origin. Some of these applications require highly accurate location information of sensor nodes. However, in many applications, knowledge of coarse accuracy of sensor node localization is sufficient. In such applications, range-freelocalization techniques